Pentax U-Series Compact Porro-Prism UP 8x25 Binocular Black. Aspherical lens elements give you edge-to-edge sharpness. They are a perfect utility companion for a multitude of applications. These compact inverted porro-prism models feature a durable dual-axis single body design with synchronized IPD adjustment and full multi-coating for better light transmission. Aspherical lens elements give you edge-to-edge sharpness. They are a perfect utility companion for a multitude of applications. Specifications for Pentax U-Series Compact UP 8x25 Binocular: Manufacturer: Pentax Color: Black Magnification: 8 x Objective Lens Diameter: 25 mm Prism System: Porro Eye Relief: 15 mm Exit Pupil: 3.1 mm Field of View Linear: 108 m at 1000 m Field of View Angle: 6.2 degrees Binoculars Focus System: Center Focus Weather Resistance: SplashProof Rain Resistant Weight: 10.6 oz Magnification Type: Fixed Size Class: Compact Features of Pentax U-Series Compact UP 8x25 Binocular New fully multi-coated optics Inverted porro prism design Aspherical lens elements providing edge-to-edge sharpness High Quality BaK4 prism to enhance transmission and resolution Dual-axis single body design with synchronized eye-piece IPD adjustment Deep blue-tinted rubber armouring for maximum protection and grip Pull-up eyecups combined with comfortable eye-relief Centrally-located lockable diopter adjustment Package Contents: Pentax U-Series Compact UP 8x25 Binocular Pentax 61901: U-Series Compact Porro-Prism UP 8x25 Binocular Black